From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
The superior performance of the B.W.P. oil delivery device over conventional systems and the nature of tests conducted.
| Identifier | ExFiles\Box 135\3\ scan0086 | |
| Date | 25th October 1934 guessed | |
| 12. disturbed by the same currents. It is believed from the above that it has been pretty definitely established that under any and all operating conditions oil delivered to the bearings by the B.W.P. device is of a vastly superior quality to that oil delivered to those points in the engine requiring lubrication when using the conventional suction bell and screen assembly. It is for this reason that the screen area which is somewhat less than used on some systems, is perfectly satisfactory. It is believed that it will be apparent to any engineer that in the case of the B.W.P. device, the work done by the screen is so much less that it can be conveniently reduced in area, and still produce a high quality of oil and deliver that oil continuously over a long period of time. It has been contended by the manufacturer of this device that because of its design its operation in cold oil in zero temperatures is such as to producc continuous registration of oil pressure without the customary fluctuation of the oil gauge needle. In order to prove this contention one important automotice manufacturer in the industry whose name is obviously withheld, conducted certain tests in their cold room. NATURE OF TESTS: Using one of their standard oil sump, with oil pump and screen assemblies, same was filled to normal level with Oil. The pump was revolved at 750 revolutions per minute, by an electric motor, the oil distributed from the pump through dummy distribution lines through several 1/8 inch holes drilled in their sides to simulate the throw-off from the main and connecting rod bearings. A similar set-up was | ||